Inside the British hospital that saved Prime Minister Boris Johnson from COVID-19, intensive care nurse Dave Carr just wants out.

"We are dead on our feet, physically. We are dead on our feet, mentally," he said. "I don't know how to get out of this mess. I can't walk away because of the guilt of leaving my colleagues."

Britain, its hospitals and its COVID-19 strategy are under the microscope as the country enters the dangerous winter period while accounting for almost a tenth of the world's recorded new infections.